data/text/DLP4/900337

TPS3840: Need voltage supervisor to support 700mA.

Part Number: TPS3840 Dear TI, I need to disable the TPS63070 when battery voltage VBAT drop below 2.9V. The board also powered by USB (when connected to USB and VBAT is disabled), and VUSB connected to EN to the TPS63070. When no USB the board powered by VBAT. Question is the board need 700mA, if TPS3840 Input pin connected to VBAT and RESET pin connected to VIN pin and EN pin of TPS63070, can TPS3840 handle 700mA of load. No to confuse, can TPS3840 handle 700mA passthru current from battery to load? Can you recommend other part if this part is not suitable. BRgds Manimaran

Hi Manimaran, The TPS3840 cannot handle 700mA because it is not pass through device. I would recommend a supervisor like the TPS3840 to monitor the voltage for 2.9 UV and a load switch such as the TPS22919 that can pass through the current. A supervisor can control the EN switch on the TPS22919.

Hi Marcoo, Thanks for this info, the load switch could be a solution for my application. But if you have a device similar to load switch but has two inputs and one output, the input each has enable pin or one enable pin control both inputs is great. For example the device need to be, when VBAT and VUSB is high, the single Enable if high VBAT will be the output and when Enable is low, VUSB is the output. Again the load will be 700mA. BRgds

Then your device will be something like the TPS2121. I will connect you with the team for further support.